JP6029999B2 - Folding container - Google Patents

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JP6029999B2
JP6029999B2 JP2013031621A JP2013031621A JP6029999B2 JP 6029999 B2 JP6029999 B2 JP 6029999B2 JP 2013031621 A JP2013031621 A JP 2013031621A JP 2013031621 A JP2013031621 A JP 2013031621A JP 6029999 B2 JP6029999 B2 JP 6029999B2
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wall portion
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窪田　吉洋
吉洋 窪田
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Sanko Co Ltd
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Description

本発明は、物品の運搬等に使用される折畳み容器に関するものである。   The present invention relates to a folding container used for transporting articles.

従来、略矩形板状の底壁部と、底壁部の各側辺部からそれぞれ上方に延出する側壁部と、側壁部の上辺部に沿って設けられた四角枠状の上枠とを備え、上方に開口する箱型形状に組立可能に構成されるとともに、各側壁部を底壁部の上方に折畳むことのできる折畳み容器が知られている。また、上枠を備えるタイプの側壁部は、下辺部側が底壁部の側辺部に対して回動可能に連結される下壁部と、上辺部側が上枠に対して回動可能に連結されるとともに、下辺部側が下壁部の上辺部側に対して回動可能に連結される上壁部とを具備する相対する一対の第１側壁部と、上辺部側が上枠に対して回動可能に連結される相対する一対の第２側壁部とを備えている。そして、箱型に組立てられた組立状態から、第２側壁部を底壁部の上方に跳ね上げるとともに、下壁部の外面と上壁部の外面とを合わせるようにして第１側壁部を内側に折畳むことで、第１側壁部及び第２側壁部が底壁部の上方に折畳まれた折畳み状態とすることができるようになっている。   Conventionally, a substantially rectangular plate-shaped bottom wall portion, a side wall portion extending upward from each side portion of the bottom wall portion, and a rectangular frame-shaped upper frame provided along the upper side portion of the side wall portion, There is known a folding container that can be assembled into a box shape that opens upward and that can fold each side wall portion above the bottom wall portion. In addition, the side wall portion of the type having an upper frame has a lower wall portion whose lower side portion is rotatably connected to a side portion of the bottom wall portion, and an upper side portion which is rotatably connected to the upper frame. And a pair of opposing first side walls having an upper wall portion that is pivotally connected to the upper side portion of the lower wall portion, and the upper side portion rotates with respect to the upper frame. And a pair of opposing second side wall portions that are movably connected. Then, from the assembled state assembled in the box shape, the second side wall portion is flipped up above the bottom wall portion, and the first side wall portion is moved inward so as to match the outer surface of the lower wall portion and the outer surface of the upper wall portion. The first side wall part and the second side wall part can be folded into the folded state above the bottom wall part.

また、一般に、このような折畳み容器には、組立状態とした場合に、第１側壁部と第２側壁部とが互いに係合されるような構成が採用される。例えば、第１側壁部には、その左右側部において内面から突出する係合部材が設けられ、第２側壁部には、折畳み容器を組立状態とした場合に、前記係合部材の先端から第１側壁部の横幅方向中央側に突出する挿入片が挿入される凹部を有する嵌合部材が設けられるといった技術がある（例えば、特許文献１等参照。）。   In general, such a folding container employs a configuration in which the first side wall and the second side wall are engaged with each other when in the assembled state. For example, the first side wall is provided with an engaging member that protrudes from the inner surface at the left and right sides thereof, and the second side wall is provided with a first container from the tip of the engaging member when the folding container is in an assembled state. There is a technique in which a fitting member having a concave portion into which an insertion piece protruding to the center side in the lateral width direction of one side wall portion is provided (see, for example, Patent Document 1).

特開２００６−１８８２６８号公報JP 2006-188268 A

しかしながら、上記特許文献１の技術では、略Ｌ字状の係合部材が第１側壁部の内面から突出形成されている。このため、係合部材は、折畳み容器を折畳み状態とした場合において、下壁部や上壁部の内面のその他の部位よりも底壁部や第２側壁部に対して上下に近接したり、当接したりすることとなる。従って、折畳み状態にある折畳み容器が上からの加重を受けた場合に、係合部材が底壁部や第２側壁部に圧接される等して比較的大きく変形してしまい、場合によっては、損傷してしまうことが懸念される。   However, in the technique of Patent Document 1, a substantially L-shaped engagement member is formed to protrude from the inner surface of the first side wall. For this reason, when the engaging member is in a folded state, the engaging member is closer to the bottom wall part or the second side wall part than the other part of the inner surface of the lower wall part or the upper wall part, It will abut. Therefore, when the folding container in the folded state receives a load from above, the engaging member is deformed relatively greatly, such as being pressed against the bottom wall part or the second side wall part, and in some cases, There is concern about being damaged.

本発明は、上記例示した問題点等を解決するためになされたものであって、その目的は、側壁部同士を係合させる係合部の剛性を高めることのできる折畳み容器を提供することにある。   The present invention has been made to solve the above-described problems and the like, and an object of the present invention is to provide a folding container that can increase the rigidity of the engaging portion that engages the side wall portions. is there.

以下、上記課題等を解決するのに適した各手段につき項分けして説明する。なお、必要に応じて対応する手段に特有の作用効果等を付記する。   In the following, each means suitable for solving the above-described problems will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

手段１．略矩形板状の底壁部と、前記底壁部の各側辺部からそれぞれ上方に延出する側壁部と、前記側壁部の上辺部に沿って設けられた四角枠状の上枠とを備え、
前記側壁部は、下辺部側が前記底壁部の側辺部に対して回動可能に連結される下壁部と、上辺部側が前記上枠に対して回動可能に連結されるとともに、下辺部側が前記下壁部の上辺部側に対して回動可能に連結される上壁部とを具備する相対する一対の第１側壁部と、上辺部側が前記上枠に対して回動可能に連結される相対する一対の第２側壁部とを備え、
箱型に組立てられた組立状態から、前記第２側壁部を前記底壁部の上方に跳ね上げるとともに、前記下壁部の外面と前記上壁部の外面とを合わせるようにして前記第１側壁部を内側に折畳むことで、前記第１側壁部及び前記第２側壁部が前記底壁部の上方に折畳まれた折畳み状態とすることのできる折畳み容器において、
前記下壁部及び前記上壁部のうち少なくとも一方には、折畳み容器の組立状態において、前記第２側壁部に設けられた被係合部と係合する係合部が設けられ、
前記係合部は、
前記第１側壁部の側辺部、又は、その近傍位置において前記第１側壁部の内面から突出する突片と、
前記突片の先端部、又は、その近傍位置から前記第１側壁部の横幅方向中央部側に突出し、組立状態において前記被係合部に設けられた凹部又は孔部に挿入される挿入片とを備えるとともに、
前記突片の内側に対向して設けられている対向面と、前記突片と、前記挿入片との間を連結する補強リブを備えていることを特徴とする折畳み容器。 Means 1. A substantially rectangular plate-shaped bottom wall, side walls extending upward from each side of the bottom wall, and a rectangular frame-shaped upper frame provided along the upper side of the side wall. Prepared,
The side wall includes a lower wall part whose lower side part is rotatably connected to a side part of the bottom wall part, and an upper side part which is rotatably connected to the upper frame. A pair of opposing first side walls having an upper wall connected to the upper side of the lower wall so as to be rotatable relative to the upper side of the lower wall, and an upper side of the upper side being rotatable relative to the upper frame A pair of opposing second side wall portions connected,
From the assembled state assembled in a box shape, the second side wall portion jumps up above the bottom wall portion, and the outer surface of the lower wall portion and the outer surface of the upper wall portion are aligned with each other. In the folding container which can be in a folded state in which the first side wall and the second side wall are folded above the bottom wall by folding the part inward,
At least one of the lower wall portion and the upper wall portion is provided with an engaging portion that engages with an engaged portion provided on the second side wall portion in the assembled state of the folding container,
The engaging portion is
A projecting piece projecting from the inner surface of the first side wall at the side of the first side wall or in the vicinity thereof;
An insertion piece that protrudes from the front end portion of the projecting piece or the vicinity thereof to the central side in the width direction of the first side wall portion and is inserted into a recess or hole provided in the engaged portion in the assembled state; With
A folding container comprising a facing surface provided facing the inside of the protruding piece, a reinforcing rib for connecting the protruding piece and the insertion piece.

手段１によれば、第１側壁部の内面から突出する突片と、突片の略先端から第１側壁部の横幅方向中央側に突出する挿入片とを具備する係合部に対し、突片の内側に対向して設けられている対向面と、突片と、挿入片との間を連結する補強リブが設けられている。このため、係合部の剛性を高めることができ、係合部が押圧される等して比較的大きく変形し、場合によっては、損傷等してしまうといった事態を防止することができる。 According to means 1, to the engagement portion comprising a projecting piece projecting from the inner surface of the first side wall portion, and an insertion piece protruding from substantially the distal end of the protrusion in the width direction central side of the first side wall, butt Reinforcing ribs are provided to connect the facing surface provided facing the inside of the piece , the projecting piece, and the insertion piece. For this reason, it is possible to increase the rigidity of the engaging portion, and it is possible to prevent a situation in which the engaging portion is deformed relatively greatly by being pressed or the like, and may be damaged in some cases.

尚、「補強リブが挿入片の突片からの突出方向先端部にまで延在していること」で、挿入片を成形する金型の型抜き方向において、挿入片と補強リブとで囲まれた領域がアンダーカット形状になってしまう（或いは、これを回避するために挿入片に切り込み部を形成しなければならない）といった事態を回避することができる。
It should be noted that because the “ reinforcing rib extends to the tip of the insertion piece in the protruding direction from the protruding piece”, the insertion piece is surrounded by the reinforcing rib in the die-cutting direction of the mold for forming the insertion piece. It is possible to avoid a situation in which the region becomes an undercut shape (or a cut portion must be formed in the insertion piece to avoid this).

手段２．前記被係合部は、組立状態において、前記突片と、前記挿入片と、前記補強リブとの間に形成される空間に挿入される支持壁部を備え、
前記支持壁部には、組立状態において前記補強リブの進入を許容する進入凹部が形成されていることを特徴とする手段１に記載の折畳み容器。 Mean 2. The engaged portion includes a support wall portion that is inserted into a space formed between the protruding piece, the insertion piece, and the reinforcing rib in an assembled state;
The folding container according to means 1, wherein the support wall is formed with an entry recess that allows entry of the reinforcing rib in the assembled state.

手段２によれば、被係合部の支持壁部に対し補強リブの進入を許容する進入凹部を形成したことで、補強リブが挿入片を被係合部の凹部又は孔部に挿入させる際の妨げとならないようになっている。このため、挿入片の突出方向先端部にまで補強リブを延在させても、挿入片を被係合部の凹部又は孔部に確実に挿入させることができる。このように、補強リブを設けた場合でも確実に係合部と被係合部とを係合させることができる上、挿入片の突出方向先端部にまで補強リブを延在させることで、挿入片の先端部まで確実に剛性を高めることができる。   According to the means 2, when the reinforcing rib is inserted into the recessed portion or the hole of the engaged portion by forming the entering concave portion that allows the reinforcing rib to enter the support wall portion of the engaged portion. It is designed not to be a hindrance. For this reason, even if a reinforcing rib is extended to the front-end | tip part of the protrusion direction of an insertion piece, an insertion piece can be reliably inserted in the recessed part or hole of an to-be-engaged part. As described above, even when the reinforcing rib is provided, the engaging portion and the engaged portion can be reliably engaged with each other, and the reinforcing rib is extended to the distal end portion in the protruding direction of the insertion piece, thereby being inserted. The rigidity can be reliably increased up to the tip of the piece.

また、挿入片と支持壁部とが係合するだけでなく、補強リブと支持壁部（進入凹部）とも係合することとなるため、係合部位（係合面積や係合で規制できる方向）が増え、より強固で安定した係合状態とすることができる。従って、側壁部間のガタツキ等をより確実に抑止することができる。   In addition to the engagement between the insertion piece and the support wall portion, the reinforcement rib and the support wall portion (entry recess) are also engaged. ) Is increased, and the engagement state can be made stronger and more stable. Therefore, rattling between the side wall portions can be more reliably suppressed.

尚、補強リブが「前記型抜き開口部を画定する開口内側面のうち前記突片が設けられた側とは反対の対向面と、前記突片と、前記挿入片との間を連結する」ような構成の場合において、「補強リブが挿入片の突片からの突出方向先端部にまで延在していること」で、挿入片を成形する金型の型抜き方向において、挿入片と補強リブとで囲まれた領域がアンダーカット形状になってしまう（或いは、これを回避するために挿入片に切り込み部を形成しなければならない）といった事態を回避することができる。   In addition, the reinforcing rib is “connects the facing surface opposite to the side on which the protruding piece is provided on the inner surface of the opening that defines the die opening, and the protruding piece and the inserting piece”. In the case of such a configuration, “the reinforcing rib extends to the tip end in the protruding direction from the protruding piece of the inserting piece”, so that the inserting piece and the reinforcing member are reinforced in the mold releasing direction of the mold for forming the inserting piece. It is possible to avoid a situation in which the region surrounded by the ribs has an undercut shape (or a cut portion must be formed in the insertion piece in order to avoid this).

手段３．前記第１側壁部に設けられる前記係合部は、前記上壁部及び前記下壁部の両方に設けられ、
折畳み状態において、前記上壁部に設けられた前記係合部の前記補強リブと、前記下壁部に設けられた前記係合部の前記補強リブとが上下に当接可能に構成されていることを特徴とする手段１又は２に記載の折畳み容器。 Means 3. The engaging portion provided on the first side wall portion is provided on both the upper wall portion and the lower wall portion,
In the folded state, the reinforcing rib of the engaging portion provided on the upper wall portion and the reinforcing rib of the engaging portion provided on the lower wall portion are configured to be able to contact vertically. The folding container according to means 1 or 2, characterized in that.

手段３によれば、折畳み状態において、例えば、上壁部に対して下向きの力が加えられた場合に、上壁部の補強リブが下壁部の補強リブに当接して支持されることとなる。このため、上壁部及び下壁部の補強リブ同士が互いの変形を抑制し合うこととなり、係合部が比較的大きく変形し、場合によっては係合部が損傷してしまうといった事態を防止することができる。従って、折畳み容器の折畳み状態における係合部の損傷をより確実に防止することができる。   According to the means 3, in a folded state, for example, when a downward force is applied to the upper wall portion, the reinforcing rib of the upper wall portion is in contact with and supported by the reinforcing rib of the lower wall portion. Become. For this reason, the reinforcing ribs of the upper wall portion and the lower wall portion suppress each other's deformation, and the engagement portion is relatively largely deformed, and in some cases, the engagement portion is prevented from being damaged. can do. Therefore, damage to the engaging portion in the folded state of the folding container can be prevented more reliably.

折畳み容器の上面側を示す斜視図である。It is a perspective view which shows the upper surface side of a folding container. 折畳み容器の下面側を示す斜視図である。It is a perspective view which shows the lower surface side of a folding container. 折畳み、或いは、組立ての過程にある折畳み容器の斜視図である。It is a perspective view of the folding container in the process of folding or an assembly. 折畳み、或いは、組立ての過程にある折畳み容器の斜視図である。It is a perspective view of the folding container in the process of folding or an assembly. 折畳み状態にある折畳み容器の斜視図である。It is a perspective view of the folding container in a folded state. 短辺側側壁部の内面側を示す斜視図である。It is a perspective view which shows the inner surface side of a short side wall part. 短辺側側壁部の外面側を示す斜視図である。It is a perspective view which shows the outer surface side of a short side wall part. 図７のＪ部を示す部分拡大斜視図である。It is a partial expansion perspective view which shows the J section of FIG. 長辺側側壁部の内面側を示す斜視図である。It is a perspective view which shows the inner surface side of a long side wall part. （ａ）は図９のＫ部を示す部分拡大斜視図であり、（ｂ）は（ａ）のＡ−Ａ線断面図である。(A) is the elements on larger scale which show the K section of FIG. 9, (b) is the sectional view on the AA line of (a). 長辺側側壁部の外面側を示す斜視図である。It is a perspective view which shows the outer surface side of a long side wall part. 図１１のＬ部を示す部分拡大斜視図である。It is a partial expansion perspective view which shows the L section of FIG. 組立状態にある折畳み容器の係合部及び被係合部等を示す一部断面を含む斜視図である。It is a perspective view including the partial cross section which shows the engaging part, engaged part, etc. of the folding container in an assembly state. 折畳み、或いは、組立ての過程にある折畳み容器の係合部及び被係合部等を示す一部断面を含む斜視図である。It is a perspective view including the partial cross section which shows the engaging part of the folding container in the process of folding or an assembly, an engaged part, etc. 折畳み状態にある折畳み容器の係合部等を示す一部断面を含む斜視図である。It is a perspective view including the partial cross section which shows the engaging part etc. of the folding container in a folding state.

以下に、一実施形態について図面を参照して説明する。図１、図２等に示すように、折畳み容器１は、上方に開口する略四角箱状をなし、物品を収容可能な容器本体２と、容器本体２の開口部を開閉可能な一対の蓋部材３とを備えている。本実施形態の容器本体２及び蓋部材３は、それぞれポリプロピレンにより構成されている。   Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIGS. 1 and 2, the folding container 1 has a substantially square box shape that opens upward, a container body 2 that can store articles, and a pair of lids that can open and close the opening of the container body 2. And a member 3. The container body 2 and the lid member 3 of the present embodiment are each made of polypropylene.

容器本体２は、略矩形板状の底壁部４と、底壁部４の相対する一対の長辺部に対応してそれぞれ設けられた第１側壁部としての長辺側側壁部５と、底壁部４の相対する一対の短辺部に対応してそれぞれ設けられた第２側壁部としての短辺側側壁部６と、長辺側側壁部５及び短辺側側壁部６の上辺部に沿って設けられた四角枠状の上枠７とを備えている。   The container body 2 includes a substantially rectangular plate-like bottom wall portion 4 and a long side wall portion 5 as a first side wall portion provided corresponding to a pair of opposed long side portions of the bottom wall portion 4, A short side wall 6 as a second side wall provided corresponding to a pair of opposing short sides of the bottom wall 4, and the upper side of the long side wall 5 and the short side wall 6 And a rectangular frame-like upper frame 7 provided along the line.

また、図３〜図５等に示すように、本実施形態の容器本体２は折畳み可能に構成されている。すなわち、長辺側側壁部５は、底壁部４の長辺部に対して回動可能に連結される下壁部８と、上枠７の長辺部に対して回動可能に連結される上壁部９とを備え、下壁部８の上辺部と上壁部９の下辺部とが回動可能に連結されている。本実施形態では、図４に示すように、上壁部９と下壁部８との連結部を容器本体２の内側に押し込むように押圧することで、上壁部９の外面と下壁部８の外面とを合わせるようにして長辺側側壁部５を折畳み可能になっている。   Moreover, as shown in FIGS. 3-5 etc., the container main body 2 of this embodiment is comprised so that folding is possible. That is, the long side wall portion 5 is rotatably connected to the lower wall portion 8 that is rotatably connected to the long side portion of the bottom wall portion 4 and the long side portion of the upper frame 7. And an upper side portion of the lower wall portion 8 and a lower side portion of the upper wall portion 9 are rotatably connected. In the present embodiment, as shown in FIG. 4, the outer surface and the lower wall portion of the upper wall portion 9 are pressed by pressing the connecting portion between the upper wall portion 9 and the lower wall portion 8 so as to be pushed into the inside of the container body 2. The long side wall portion 5 can be folded so as to match the outer surface 8.

図３等に示すように、短辺側側壁部６は、上枠７の短辺部に対して回動可能に連結されている。本実施形態では、短辺側側壁部６を容器本体２の内側に押し込むように押圧することで、短辺側側壁部６を略水平に延在するまで回動可能になっている。また、短辺側側壁部６の横幅は、一対の長辺側側壁部５間の距離とほぼ同じであり、容器本体２の組立状態では一対の長辺側側壁部５の間に位置している上、短辺側側壁部６と上枠７との回転軸は、長辺側側壁部５と上枠７との回転軸よりも上方に位置している。このため、組立状態にある容器本体２は、先ず、一対の短辺側側壁部６を容器本体２の内側に押圧して水平に延在するまで回動させて（跳ね上げて）から、一対の長辺側側壁部５を折り曲げることで、底壁部４の上方に長辺側側壁部５及び短辺側側壁部６が折畳まれた（折重ねられた）折畳み状態とすることができるようになっている（図１５参照）。   As shown in FIG. 3 and the like, the short side wall 6 is rotatably connected to the short side of the upper frame 7. In the present embodiment, by pressing the short side wall 6 so as to be pushed into the inside of the container body 2, the short side wall 6 can be rotated until it extends substantially horizontally. Further, the lateral width of the short side wall portion 6 is substantially the same as the distance between the pair of long side wall portions 5 and is positioned between the pair of long side wall portions 5 in the assembled state of the container body 2. In addition, the rotation axis of the short side wall 6 and the upper frame 7 is located above the rotation axis of the long side wall 5 and the upper frame 7. For this reason, the container main body 2 in the assembled state first presses the pair of short side wall portions 6 against the inner side of the container main body 2 and rotates (bounces up) until it horizontally extends, By folding the long side wall portion 5, the long side wall portion 5 and the short side wall portion 6 can be folded over the bottom wall portion 4. (See FIG. 15).

図１等に示すように、上枠７は、一対の長辺側側壁部５にそれぞれ連結される一対の長辺部（長辺側枠構成部７ａ）と、一対の短辺側側壁部６にそれぞれ連結される一対の短辺部（短辺側枠構成部７ｂ）とを備え、上枠７の外寸は、底壁部４の外寸とほぼ等しくなっている。また、容器本体２の折畳み状態では、折畳まれた長辺側側壁部５と、その上方に重なる短辺側側壁部６とが上枠７の内周側に収容されるとともに、底壁部４と上枠７とが上下に直接当接するように構成されている（図５、図１５参照）。   As shown in FIG. 1 and the like, the upper frame 7 includes a pair of long side portions (long side frame constituting portion 7a) connected to the pair of long side wall portions 5 and a pair of short side wall portions 6 respectively. A pair of short sides (short side frame constituting portion 7b) connected to each other, and the outer size of the upper frame 7 is substantially equal to the outer size of the bottom wall portion 4. Further, in the folded state of the container body 2, the folded long side wall portion 5 and the short side wall portion 6 that overlaps the long side wall portion 5 are accommodated on the inner peripheral side of the upper frame 7, and the bottom wall portion 4 and the upper frame 7 are configured to directly contact each other vertically (see FIGS. 5 and 15).

図１等に示すように、蓋部材３は、上枠７の相対する一対の長辺側枠構成部７ａの上辺部に対してそれぞれ回動可能に連結されている。本実施形態の蓋部材３は、容器本体２の開口部を覆って略水平に延び、上枠７の上辺部に支持される位置から、蓋部材３の上面が長辺側側壁部５の外面と対向するようにして長辺側側壁部５の外面側に並設されて略鉛直に延びる位置となるまで開放可能に構成されている。また、蓋部材３を閉状態とすることで、容器本体２が組立状態及び折畳み状態のどちらにあっても、折畳み容器１同士を上下に積み重ねる（段積みする）ことができるようになっている。   As shown in FIG. 1 and the like, the lid member 3 is connected to the upper sides of a pair of long side frame constituting portions 7a opposed to the upper frame 7 so as to be rotatable. The lid member 3 of the present embodiment covers the opening of the container body 2 and extends substantially horizontally, and the upper surface of the lid member 3 is the outer surface of the long side wall portion 5 from the position supported by the upper side portion of the upper frame 7. So as to be opposed to the outer surface of the long side wall 5 and open up to a position extending substantially vertically. Moreover, by making the cover member 3 into the closed state, the folded containers 1 can be stacked up and down (stacked) regardless of whether the container body 2 is in the assembled state or the folded state. .

次に、容器本体２の組立状態において、長辺側側壁部５と短辺側側壁部６との相対変位を防止するための係合構造について、図面を参照して説明する。   Next, an engagement structure for preventing relative displacement between the long side wall portion 5 and the short side wall portion 6 in the assembled state of the container body 2 will be described with reference to the drawings.

図９〜図１２に示すように、容器本体２を折畳み状態から組立状態とする際に先に起立姿勢（上下に延びた状態）とさせる長辺側側壁部５には、後から起立姿勢とされる短辺側側壁部６の外面側を支持する係合部１１が設けられている。図１０等に示すように、係合部１１は、下壁部８及び上壁部９の左右両側部においてそれぞれ下壁部８及び上壁部９の内面から突出する突片１２と、突片１２の先端部から下壁部８及び上壁部９の横幅方向中央部側に突出する挿入片１３とを備えている。   As shown in FIGS. 9 to 12, when the container body 2 is changed from the folded state to the assembled state, the long side wall portion 5 that is first brought into the standing posture (the vertically extended state) has a standing posture afterwards. An engaging portion 11 that supports the outer surface side of the short side wall portion 6 is provided. As shown in FIG. 10 and the like, the engaging portion 11 includes projecting pieces 12 projecting from the inner surfaces of the lower wall portion 8 and the upper wall portion 9 at the left and right side portions of the lower wall portion 8 and the upper wall portion 9, respectively. 12 and an insertion piece 13 that protrudes from the front end portion of the lower wall portion 8 and the upper wall portion 9 toward the center in the horizontal width direction.

また、係合部１１は、図１０等に示すように、挿入片１３のうち長辺側側壁部５の外面側の面を成形する金型を長辺側側壁部５の外面側に抜き取るための型抜き開口部１６を画定する開口内側面１７と、突片１２と、挿入片１３との間を連結する補強リブ１４を備えている。特に、本実施形態の補強リブ１４は、図１０（ｂ）に示すように、開口内側面１７のうち突片１２が設けられた側とは反対の対向面１７ａと、突片１２と、挿入片１３との間を連結するように設けられている。さらに、補強リブ１４は、挿入片１３の突片１２からの突出方向先端部にまで延設されている。加えて、補強リブ１４は、図１１、図１２に示すように、長辺側側壁部５の厚み方向において、長辺側側壁部５（下壁部８及び上壁部９）の外面と面一となるまで延在している。   Further, as shown in FIG. 10 and the like, the engaging portion 11 is used for extracting a mold for molding the outer surface side surface of the long side wall portion 5 from the insertion piece 13 to the outer surface side of the long side wall portion 5. A reinforcing rib 14 is provided to connect between the opening inner side surface 17 that defines the die-cut opening 16, the projecting piece 12, and the insertion piece 13. In particular, as shown in FIG. 10B, the reinforcing rib 14 of the present embodiment includes an opposing surface 17a opposite to the side on which the protruding piece 12 is provided on the inner surface 17 of the opening, the protruding piece 12, and the insertion. It is provided so as to connect the piece 13. Further, the reinforcing rib 14 extends to the tip end portion of the insertion piece 13 from the protruding piece 12 in the protruding direction. In addition, as shown in FIGS. 11 and 12, the reinforcing rib 14 has an outer surface and a surface of the long side wall portion 5 (the lower wall portion 8 and the upper wall portion 9) in the thickness direction of the long side wall portion 5. It extends until it becomes one.

これに対し、短辺側側壁部６には、図７、図８に示すように、容器本体２の組立状態において、前記係合部１１の挿入片１３が挿入される挿入凹部２２を有する被係合部２１が設けられている。また、図６〜図８に示すように、被係合部２１は、容器本体２の組立状態において、突片１２と、挿入片１３と、補強リブ１４との間に形成される空間に挿入される支持壁部２３を備えている。さらに、支持壁部２３には、容器本体２の組立状態において補強リブ１４の進入が許容される進入凹部２４が形成されている。これにより、図１３、図１４に示すように、挿入片１３の先端部にまで補強リブ１４が形成されていても、容器本体２を組立状態とする際に、補強リブ１４が支持壁部２３と干渉し合うことなく、挿入片１３を被係合部２１の挿入凹部２２に確実に挿入させることができるようになっている。   On the other hand, as shown in FIGS. 7 and 8, the short side wall 6 has an insertion recess 22 into which the insertion piece 13 of the engaging portion 11 is inserted in the assembled state of the container body 2. An engaging portion 21 is provided. Further, as shown in FIGS. 6 to 8, the engaged portion 21 is inserted into a space formed between the projecting piece 12, the insertion piece 13, and the reinforcing rib 14 in the assembled state of the container body 2. The supporting wall portion 23 is provided. Further, the support wall portion 23 is formed with an entry recess 24 in which the reinforcement rib 14 is allowed to enter when the container body 2 is assembled. Accordingly, as shown in FIGS. 13 and 14, even when the reinforcing rib 14 is formed up to the distal end portion of the insertion piece 13, the reinforcing rib 14 is supported by the support wall portion 23 when the container body 2 is put into an assembled state. The insertion piece 13 can be reliably inserted into the insertion recess 22 of the engaged portion 21 without interfering with each other.

また、挿入片１３が挿入凹部２２に挿入されることによって、係合部１１と被係合部２１とが係合状態となり、短辺側側壁部６の外方への変位が規制されるだけでなく、下壁部８及び上壁部９の外方への変位やガタツキ等が抑制される。ちなみに、容器本体２を組立状態とすることで、起立姿勢とされた短辺側側壁部６が、一対の長辺側側壁部５の間に位置することにより、長辺側側壁部５が容器本体２の内側に折畳まれるような下壁部８及び上壁部９の変位が防止されるようになっている。尚、短辺側側壁部６の内倒れを防止する構成（例えば、長辺側側壁部５の内面から突出して短辺側側壁部６の内面と接触可能な弾性片）を設けることとしてもよい。   Further, by inserting the insertion piece 13 into the insertion recess 22, the engaging portion 11 and the engaged portion 21 are engaged, and only the outward displacement of the short side wall portion 6 is restricted. In addition, the outward displacement and backlash of the lower wall portion 8 and the upper wall portion 9 are suppressed. Incidentally, when the container body 2 is in the assembled state, the short side wall portion 6 in the standing posture is positioned between the pair of long side wall portions 5 so that the long side wall portion 5 becomes the container. Displacement of the lower wall portion 8 and the upper wall portion 9 that are folded inside the main body 2 is prevented. In addition, it is good also as providing the structure (For example, the elastic piece which protrudes from the inner surface of the long side wall part 5 and can contact the inner surface of the short side wall part 6) which prevents the inner wall of the short side wall part 6 from falling down. .

また、本実施形態では、係合部１１は、下壁部８及び上壁部９においてそれぞれ上下２箇所ずつに設けられている。さらに、図１５に示すように、容器本体２を折畳み状態とした場合、上壁部９に設けられた係合部１１の補強リブ１４と、下壁部８に設けられた係合部１１の補強リブ１４とが上下に略当接するように構成されている。このため、例えば、折畳み状態の折畳み容器１同士を段積みした場合、下側の折畳み容器１に関し、上壁部９の補強リブ１４が下壁部８の補強リブ１４に当接して支持されることとなる。   Moreover, in this embodiment, the engaging part 11 is provided in the upper and lower two places in the lower wall part 8 and the upper wall part 9, respectively. Furthermore, as shown in FIG. 15, when the container body 2 is in a folded state, the reinforcing rib 14 of the engaging portion 11 provided on the upper wall portion 9 and the engaging portion 11 provided on the lower wall portion 8 The reinforcing rib 14 is configured to substantially abut on the top and bottom. For this reason, for example, when folding containers 1 in a folded state are stacked, the reinforcing ribs 14 of the upper wall portion 9 are supported by contacting the reinforcing ribs 14 of the lower wall portion 8 with respect to the lower folding containers 1. It will be.

加えて、図１０（ａ）に示すように、本実施形態の係合部１１は、挿入片１３の上辺部及び下辺部の基端部側（突片１２側）の部位と、突片１２の上辺部及び下辺部との間を連結する連結リブ１５を備えている。その一方で、図８に示すように、支持壁部２３は、容器本体２を組立状態とする場合に、かかる連結リブ１５との干渉を避けるような形状になっている。これにより、連結リブ１５が存在しても、短辺側側壁部６を確実に起立姿勢とし、支持壁部２３の先端を突片１２に略当接するまで、突片１２と、挿入片１３と、補強リブ１４との間に形成される空間に相対的に挿入することができる。尚、図１０（ａ）に示すように、連結リブ１５、及び、連結リブ１５に連続し、下壁部８又は上壁部９の本体部を構成するとともに、型抜き開口部１６を画定する開口内側面１７を構成する壁部は、係合部１１が、突片１２の突出方向先端側に向けて上下幅が次第に短くなるテーパ状となるように、傾斜して形成されている。   In addition, as shown in FIG. 10A, the engaging portion 11 of the present embodiment includes a portion on the base end side (projecting piece 12 side) of the upper side portion and the lower side portion of the insertion piece 13, and the projecting piece 12. The connecting rib 15 which connects between the upper side part and lower side part is provided. On the other hand, as shown in FIG. 8, the support wall portion 23 is shaped to avoid interference with the connecting rib 15 when the container body 2 is in an assembled state. Thereby, even if the connecting rib 15 exists, the projecting piece 12, the insertion piece 13, and the like are kept until the short side wall 6 is surely raised and the tip of the support wall 23 is substantially in contact with the projecting piece 12. , And can be inserted relatively into the space formed between the reinforcing ribs 14. In addition, as shown to Fig.10 (a), while connecting to the connection rib 15 and the connection rib 15, the main-body part of the lower wall part 8 or the upper wall part 9 is comprised, and the die-cut opening part 16 is demarcated. The wall portion constituting the inner surface 17 of the opening is formed so as to be inclined so that the engaging portion 11 has a tapered shape with the vertical width gradually decreasing toward the front end side in the protruding direction of the protruding piece 12.

以上詳述したように、本実施形態によれば、長辺側側壁部５の内面から突出する突片１２と、突片１２の略先端から長辺側側壁部５の横幅方向中央側に突出する挿入片１３とを具備する係合部１１に対し、挿入片１３を成形する金型を長辺側側壁部５の外面側に抜き取るための型抜き開口部１６を画定する開口内側面１７と、突片１２と、挿入片１３との間を連結する補強リブ１４が設けられている。このため、係合部１１の剛性を高めることができ、係合部１１が押圧される等して比較的大きく変形し、場合によっては、損傷等してしまうといった事態を防止することができる。   As described above in detail, according to the present embodiment, the protruding piece 12 protrudes from the inner surface of the long side wall portion 5, and protrudes from the approximate tip of the protruding piece 12 toward the center in the width direction of the long side wall portion 5. An opening inner side surface 17 that defines a die-cutting opening 16 for extracting a mold for forming the insertion piece 13 to the outer surface side of the long side wall portion 5 with respect to the engaging portion 11 having the insertion piece 13 to be formed. A reinforcing rib 14 is provided to connect the protruding piece 12 and the insertion piece 13. For this reason, the rigidity of the engaging portion 11 can be increased, and a situation in which the engaging portion 11 is deformed relatively greatly by being pressed or the like and can be prevented from being damaged in some cases can be prevented.

特に、本実施形態の補強リブ１４は、型抜き開口部１６を画定する開口内側面１７のうち突片１２が設けられた側とは反対の対向面１７ａと、突片１２と、挿入片１３との間を連結するようにして設けられている。このため、係合部１１の剛性をより一層高めるとともに、型抜き開口部１６の周りの強度（突片１２の土台となる部位の剛性）を高めることができる。   In particular, the reinforcing rib 14 of the present embodiment includes an opposing surface 17a opposite to the side on which the protruding piece 12 is provided on the inner surface 17 of the opening that defines the die opening 16, the protruding piece 12, and the insertion piece 13. Are provided so as to be connected to each other. Therefore, the rigidity of the engaging portion 11 can be further increased, and the strength around the die-cut opening 16 (the rigidity of the portion serving as the base of the projecting piece 12) can be increased.

また、本実施形態では、被係合部２１の支持壁部２３に対し補強リブ１４の進入を許容する進入凹部２４を形成したことで、補強リブ１４が挿入片１３を被係合部２１の挿入凹部２２に挿入させる際の妨げとならないようになっている。このため、挿入片１３の突出方向先端部にまで補強リブ１４を延在させても、挿入片１３を被係合部２１の挿入凹部２２に確実に挿入させることができる。このように、補強リブ１４を設けた場合でも確実に係合部１１と被係合部２１とを係合させることができる上、挿入片１３の突出方向先端部にまで補強リブ１４を延在させることで、挿入片１３の先端部まで確実に剛性を高めることができる。従って、例えば、容器本体２を組立状態とする際に、挿入片１３の被係合部２１への挿通が上手く行えなかった場合に、挿入片１３の先端が被係合部２１の周縁部に衝突して損傷等してしまうといった事態をより確実に防止することができる。   Further, in the present embodiment, by forming the entry recess 24 that allows the reinforcement rib 14 to enter the support wall portion 23 of the engaged portion 21, the reinforcement rib 14 causes the insertion piece 13 of the engaged portion 21. It does not interfere with the insertion into the insertion recess 22. For this reason, even if the reinforcing rib 14 is extended to the leading end portion in the protruding direction of the insertion piece 13, the insertion piece 13 can be reliably inserted into the insertion recess 22 of the engaged portion 21. As described above, even when the reinforcing rib 14 is provided, the engaging portion 11 and the engaged portion 21 can be reliably engaged, and the reinforcing rib 14 extends to the distal end portion in the protruding direction of the insertion piece 13. By doing so, the rigidity can be reliably increased up to the tip of the insertion piece 13. Therefore, for example, when the container body 2 is in the assembled state, if the insertion piece 13 cannot be inserted into the engaged portion 21 successfully, the tip of the insertion piece 13 is placed on the peripheral portion of the engaged portion 21. It is possible to more reliably prevent a situation such as collision and damage.

さらに、挿入片１３と支持壁部２３とが係合するだけでなく、補強リブ１４と支持壁部２３（進入凹部２４）とも係合することとなるため、係合部位（係合面積や係合で規制できる方向）が増え、より強固で安定した係合状態とすることができる。従って、側壁部５、６間のガタツキ等をより確実に抑止することができる。   Further, not only the insertion piece 13 and the support wall portion 23 are engaged, but also the reinforcing rib 14 and the support wall portion 23 (entrance recess 24) are engaged. The direction that can be regulated by the combination is increased, and the engagement state can be made stronger and more stable. Therefore, rattling between the side wall portions 5 and 6 can be more reliably suppressed.

尚、本実施形態では、補強リブ１４が、前記型抜き開口部１６を左右に横切るようにして相対する開口内側面１７間を連結しているが、補強リブ１４が挿入片１３の突出方向先端部にまで延在しない構成の場合、挿入片１３を成形する金型の型抜き方向において、挿入片１３と補強リブ１４とで囲まれる領域がアンダーカット形状になってしまう。また、これを回避するためには、挿入片１３に対して切り込み部を形成しなければならなくなってしまう。これに対し、本実施形態では、補強リブ１４が挿入片１３の突出方向先端部にまで延在していることから、上記アンダーカットの懸念を払拭することができる。   In the present embodiment, the reinforcing rib 14 connects the opening inner side surfaces 17 facing each other so as to cross the die opening 16 from side to side. In the case of a configuration that does not extend to the portion, the region surrounded by the insertion piece 13 and the reinforcing rib 14 is in an undercut shape in the mold drawing direction of the mold for forming the insertion piece 13. Further, in order to avoid this, it is necessary to form a cut portion in the insertion piece 13. On the other hand, in this embodiment, since the reinforcement rib 14 is extended to the protrusion direction front-end | tip part of the insertion piece 13, the concern of the said undercut can be wiped off.

また、本実施形態では、長辺側側壁部５の下壁部８及び上壁部９の両方に係合部１１が設けられるとともに、容器本体２の折畳み状態において、上壁部９に設けられた係合部１１の補強リブ１４と、下壁部８に設けられた係合部１１の補強リブ１４とが上下に当接可能に構成されている。このため、容器本体２の折畳み状態において、例えば、上壁部９に対して下向きの力が加えられた場合に、上壁部９の補強リブ１４が下壁部８の補強リブ１４に当接して支持されることとなる。このように、上壁部９及び下壁部８の補強リブ１４同士が互いの変形を抑制し合うこととなり、係合部１１が比較的大きく変形し、場合によっては係合部１１が損傷してしまうといった事態を防止することができる。従って、折畳み容器１の折畳み状態における係合部１１の損傷をより確実に防止することができる。   In the present embodiment, the engaging portion 11 is provided on both the lower wall portion 8 and the upper wall portion 9 of the long side wall portion 5, and is provided on the upper wall portion 9 when the container body 2 is folded. The reinforcing rib 14 of the engaging portion 11 and the reinforcing rib 14 of the engaging portion 11 provided on the lower wall portion 8 are configured to be able to contact vertically. Therefore, in the folded state of the container body 2, for example, when a downward force is applied to the upper wall portion 9, the reinforcing rib 14 of the upper wall portion 9 abuts on the reinforcing rib 14 of the lower wall portion 8. Will be supported. In this way, the reinforcing ribs 14 of the upper wall portion 9 and the lower wall portion 8 suppress each other's deformation, so that the engaging portion 11 is relatively largely deformed, and in some cases, the engaging portion 11 is damaged. Can be prevented. Accordingly, it is possible to more reliably prevent the engagement portion 11 from being damaged when the folding container 1 is folded.

尚、上記実施形態の記載内容に限定されず、例えば次のように実施してもよい。勿論、以下において例示しない他の応用例、変更例も当然可能である。   In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

（ａ）上記実施形態では、容器本体２に対して蓋部材３が回動可能に連結された折畳み容器１に具体化されているが、別のタイプの蓋部材３、例えば、着脱自在な蓋部材を備える折畳み容器に適用してもよいし、蓋部材のない折畳み容器に適用してもよい。加えて、上記実施形態では、長辺側側壁部５が下壁部８及び上壁部９を具備して高さ方向中間位置で屈曲する側壁部として構成されているが、短辺側側壁部６が屈曲する側壁部として構成され、長辺側側壁部５が折畳み状態とする際に跳ね上げられる側壁部として構成される折畳み容器に適用することも可能である。   (A) In the above embodiment, the lid member 3 is embodied in the folding container 1 rotatably connected to the container body 2, but another type of lid member 3, for example, a detachable lid You may apply to a folding container provided with a member, and may apply to a folding container without a cover member. In addition, in the above embodiment, the long side wall portion 5 includes the lower wall portion 8 and the upper wall portion 9 and is configured as a side wall portion that bends at an intermediate position in the height direction. It is also possible to apply to a folding container in which 6 is configured as a bent side wall, and the long side wall 5 is flipped up when the side wall 5 is folded.

（ｂ）上記実施形態では、下壁部８及び上壁部９にそれぞれ係合部１１が設けられているが、少なくとも一方に設けられていればよい。但し、容器本体２を組立状態とした際の下壁部８及び上壁部９それぞれのガタツキをより確実に防止するべく、両方に設けることが望ましい。   (B) In the above-described embodiment, the engaging portion 11 is provided on each of the lower wall portion 8 and the upper wall portion 9, but it may be provided on at least one of them. However, it is desirable to provide both of the lower wall portion 8 and the upper wall portion 9 when both the container main body 2 is in an assembled state in order to more reliably prevent rattling.

尚、下壁部８や上壁部９に係合部１１を設ける場合には、下壁部８や上壁部９をより安定して支持するべく、下壁部８や上壁部９の側辺部に沿って、それぞれ下壁部８や上壁部９の上部と下部とに係合部１１を設けることが望ましい。ところで、その場合、容器本体２を折畳み状態とすると、下壁部８の係合部１１と上壁部９の係合部１１とが上下に重なるような相対配置となることが考えられる。しかしながら、例えば、上壁部９の補強リブ１４の直下方に、下壁部８の型抜き開口部１６が位置するような場合、該補強リブ１４が下方に変形したとしても、該補強リブ１４を支持するものがなく、比較的大きく変形してしまうことが懸念される。この点、上記実施形態のように、容器本体２を折畳み状態とした場合に、下壁部８に設けられた係合部１１の補強リブ１４と、上壁部９に設けられた係合部１１の補強リブ１４とが上下に当接可能に構成されることで、上下の補強リブ１４が互いに支持し合うこととなり、係合部１１の変形を抑制するといった作用効果が奏される。   In addition, when providing the engaging part 11 in the lower wall part 8 or the upper wall part 9, in order to support the lower wall part 8 or the upper wall part 9 more stably, the lower wall part 8 or the upper wall part 9 It is desirable to provide the engaging portions 11 at the upper and lower portions of the lower wall portion 8 and the upper wall portion 9 along the side portions. By the way, in that case, when the container main body 2 is in the folded state, it can be considered that the engaging portion 11 of the lower wall portion 8 and the engaging portion 11 of the upper wall portion 9 are arranged so as to overlap each other. However, for example, when the die-cut opening 16 of the lower wall portion 8 is located immediately below the reinforcing rib 14 of the upper wall portion 9, even if the reinforcing rib 14 is deformed downward, the reinforcing rib 14 It is feared that there is nothing to support and that the deformation is relatively large. In this regard, when the container body 2 is in the folded state as in the above embodiment, the reinforcing rib 14 of the engaging portion 11 provided on the lower wall portion 8 and the engaging portion provided on the upper wall portion 9 are used. Since the upper and lower reinforcing ribs 14 support each other by being configured so that the upper and lower reinforcing ribs 14 can be brought into contact with each other in the vertical direction, the effect of suppressing deformation of the engaging portion 11 is achieved.

（ｃ）上記実施形態では、係合部１１に連結リブ１５が設けられているが、連結リブ１５を省略することも可能である。また、上記実施形態において、支持壁部２３に対し、進入凹部２４に沿って、挿入凹部２２の内側に突出するリブを設けることとしてもよい。この場合、支持壁部２３の強度、特に、挿入凹部２２の周縁部の強度を高めることができ、容器本体２を組立状態とする際に、支持壁部２３と、補強リブ１４とが接触した場合の支持壁部２３の変形や損傷等をより確実に抑制することができる。さらに、上記実施形態では、被係合部２１は、有底状の挿入凹部２２を有するように構成されているが、挿入片１３を挿入可能な短辺側側壁部６の厚み方向に貫通する孔部を有するように構成してもよい。但し、被係合部２１の剛性、特に、支持壁部２３の剛性を高めるべく、有底状に構成する方が好ましい。   (C) In the above embodiment, the connecting rib 15 is provided in the engaging portion 11, but the connecting rib 15 can be omitted. Moreover, in the said embodiment, it is good also as providing the rib which protrudes inside the insertion recessed part 22 along the approach recessed part 24 with respect to the support wall part 23. FIG. In this case, the strength of the support wall 23, particularly the strength of the peripheral edge of the insertion recess 22, can be increased, and the support wall 23 and the reinforcing rib 14 are in contact with each other when the container body 2 is in an assembled state. In this case, deformation or damage of the support wall 23 can be more reliably suppressed. Furthermore, in the said embodiment, although the to-be-engaged part 21 is comprised so that it may have the bottomed insertion recessed part 22, it penetrates in the thickness direction of the short side wall part 6 in which the insertion piece 13 can be inserted. You may comprise so that it may have a hole. However, in order to increase the rigidity of the engaged portion 21, particularly the rigidity of the support wall portion 23, it is preferable to configure the bottomed shape.

（ｄ）上記実施形態では、折畳み容器１はポリプロピレンにより構成されているが、ポリエチレン、ＰＥＴ、ポリアミド等その他の樹脂材料により構成されることとしてもよい。   (D) In the above embodiment, the folding container 1 is made of polypropylene, but may be made of other resin materials such as polyethylene, PET, and polyamide.

１…折畳み容器、２…容器本体、３…蓋部材、４…底壁部、５…長辺側側壁部、６…短辺側側壁部、７…上枠、８…下壁部、９…上壁部、１１…係合部、１２…突片、１３…挿入片、１４…補強リブ、１６…型抜き開口部、１７…開口内側面、２１…被係合部、２２…挿入凹部、２３…支持壁部、２４…進入凹部。   DESCRIPTION OF SYMBOLS 1 ... Folding container, 2 ... Container main body, 3 ... Cover member, 4 ... Bottom wall part, 5 ... Long side side wall part, 6 ... Short side wall part, 7 ... Upper frame, 8 ... Lower wall part, 9 ... Upper wall portion, 11 ... engaging portion, 12 ... projecting piece, 13 ... insertion piece, 14 ... reinforcing rib, 16 ... die-cut opening, 17 ... inner surface of opening, 21 ... engaged portion, 22 ... insertion recess, 23 ... support wall part, 24 ... entry recess.

Claims (3)

略矩形板状の底壁部と、前記底壁部の各側辺部からそれぞれ上方に延出する側壁部と、前記側壁部の上辺部に沿って設けられた四角枠状の上枠とを備え、
前記側壁部は、下辺部側が前記底壁部の側辺部に対して回動可能に連結される下壁部と、上辺部側が前記上枠に対して回動可能に連結されるとともに、下辺部側が前記下壁部の上辺部側に対して回動可能に連結される上壁部とを具備する相対する一対の第１側壁部と、上辺部側が前記上枠に対して回動可能に連結される相対する一対の第２側壁部とを備え、
箱型に組立てられた組立状態から、前記第２側壁部を前記底壁部の上方に跳ね上げるとともに、前記下壁部の外面と前記上壁部の外面とを合わせるようにして前記第１側壁部を内側に折畳むことで、前記第１側壁部及び前記第２側壁部が前記底壁部の上方に折畳まれた折畳み状態とすることのできる折畳み容器において、
前記下壁部及び前記上壁部のうち少なくとも一方には、折畳み容器の組立状態において、前記第２側壁部に設けられた被係合部と係合する係合部が設けられ、
前記係合部は、
前記第１側壁部の側辺部、又は、その近傍位置において前記第１側壁部の内面から突出する突片と、
前記突片の先端部、又は、その近傍位置から前記第１側壁部の横幅方向中央部側に突出し、組立状態において前記被係合部に設けられた凹部又は孔部に挿入される挿入片とを備えるとともに、
前記突片の内側に対向して設けられている対向面と、前記突片と、前記挿入片との間を連結する補強リブを備えていることを特徴とする折畳み容器。 A substantially rectangular plate-shaped bottom wall, side walls extending upward from each side of the bottom wall, and a rectangular frame-shaped upper frame provided along the upper side of the side wall. Prepared,
The side wall includes a lower wall part whose lower side part is rotatably connected to a side part of the bottom wall part, and an upper side part which is rotatably connected to the upper frame. A pair of opposing first side walls having an upper wall connected to the upper side of the lower wall so as to be rotatable relative to the upper side of the lower wall, and an upper side of the upper side being rotatable relative to the upper frame A pair of opposing second side wall portions connected,
From the assembled state assembled in a box shape, the second side wall portion jumps up above the bottom wall portion, and the outer surface of the lower wall portion and the outer surface of the upper wall portion are aligned with each other. In the folding container which can be in a folded state in which the first side wall and the second side wall are folded above the bottom wall by folding the part inward,
At least one of the lower wall portion and the upper wall portion is provided with an engaging portion that engages with an engaged portion provided on the second side wall portion in the assembled state of the folding container,
The engaging portion is
A projecting piece projecting from the inner surface of the first side wall at the side of the first side wall or in the vicinity thereof;
An insertion piece that protrudes from the front end portion of the projecting piece or the vicinity thereof to the central side in the width direction of the first side wall portion and is inserted into a recess or hole provided in the engaged portion in the assembled state; With
A folding container comprising a facing surface provided facing the inside of the protruding piece, a reinforcing rib for connecting the protruding piece and the insertion piece. 前記被係合部は、組立状態において、前記突片と、前記挿入片と、前記補強リブとの間に形成される空間に挿入される支持壁部を備え、
前記支持壁部には、組立状態において前記補強リブの進入を許容する進入凹部が形成されていることを特徴とする請求項１に記載の折畳み容器。 The engaged portion includes a support wall portion that is inserted into a space formed between the protruding piece, the insertion piece, and the reinforcing rib in an assembled state;
2. The folding container according to claim 1, wherein the support wall is formed with an entry recess that allows entry of the reinforcing rib in an assembled state. 前記第１側壁部に設けられる前記係合部は、前記上壁部及び前記下壁部の両方に設けられ、
折畳み状態において、前記上壁部に設けられた前記係合部の前記補強リブと、前記下壁部に設けられた前記係合部の前記補強リブとが上下に当接可能に構成されていることを特徴とする請求項１又は２に記載の折畳み容器。 The engaging portion provided on the first side wall portion is provided on both the upper wall portion and the lower wall portion,
In the folded state, the reinforcing rib of the engaging portion provided on the upper wall portion and the reinforcing rib of the engaging portion provided on the lower wall portion are configured to be able to contact vertically. The folding container according to claim 1 or 2, characterized in that.
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